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1. |
Use the factor tree to write the prime factorization of 120. |
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A. |
2 × 2 × 2 × 3 × 5 |
B. |
2 × 2 × 3 × 5 |
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C. |
2 × 3 × 5 |
D. |
2 × 60 |
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Hint |
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2. |
Which of the following numbers is prime? |
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A. |
15 |
B. |
1 |
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C. |
5 |
D. |
9 |
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Hint |
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3. |
Which of the following numbers is composite? |
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A. |
1 |
B. |
31 |
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C. |
23 |
D. |
9 |
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Hint |
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4. |
What are the prime factors of 400? |
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A. |
2, 200 |
B. |
2, 4, 5 |
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C. |
2, 5 |
D. |
4, 10, 10 |
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Hint |
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5. |
What are the prime factors of 810? |
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A. |
2, 3, 5 |
B. |
3, 4, 5 |
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C. |
3, 5 |
D. |
2, 5, 9 |
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Hint |
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